I just thought of another thing M2C, since you mentioned diaorrhea also, and the heaviness, and I didn't realise that you've had mild endo (in your signature - don't know how I missed it! )

Make sure you ask your doc whether your endo could be getting worse - it's not always able to be seen on a ultrasound (actually, not usually) and if it has extended to your ovaries, and even to your bowel it could be what's giving you diaorrhea and the extreme pain in the general area. Especially if your a few days away from AF and your symptoms have happened after O, when your endometrial tissue is at its thickest. It could also explain your other side effects.

Good Luck, hun. Let us know how the doc's appointment goes. Will be thinking of you.

:hugs: